Shoe roughing machine



c. G. BRosTRoM 2,043,369

SHOE ROUGHING MACHINE Filed Sept. 20, 1934 l/E/v TU@ lllll Patented June9, 1936 mrs `United Shoe Machiner N. J., a corporation of y Corporation,Paterson,

New Jersey Application September 20, 1934, Serial No. 744,823

7 Claims.

This invention relates to shoe roughing machines and is particularlyconcerned with theprovision of improved mechanism for facilitating thepresentation of the overlasted margin of a shoe upper to a roughing toolof such a machine.

In roughing the margin of the upper of a lasted shoe the shoe is held inthe hands of an operator and must be presented accurately and with theright amount of pressure to the tool, to secure a uniformly roughedsurface without damaging the thin upper leather.

It is an object of the invention to provide an improved mechanical workrest or guard with the aid of which the operator can easily andaccurately control the presentation of the work to the tool and canproduce perfect results, even though he may not be particularly skilled.

With this object in View the invention provides a bowl-shaped Work restor shield Within which a portion of a rotary roughing tool is receivedand against the upper edge or rim of which the bottom of the insole of alasted shoe is adapted to be pressed and tilted to subject theoverlasted margin of the upper to the action of the rotating tool.

The bowl-shaped rest is preferably freely rotatable, permitting the shoeto be moved past the roughing tool with a. minimum of effort while theexposed portion of the periphery of the tool acts across the rim of thebowl toward the axis thereof.

In the illustrated form of the invention there is also embodied animproved work rest mounting in which provision is made for adjustment ofthe bowl in an are concentric with the axis ,of the roughing tool tofacilitate presentation of a shoe to the tool in a position best suitedto the individual operator; .other adjustments permit the bowl to bekept close to the operating part of the tool, regardless of changes inthe size of the tool resulting from wear and resharpening.

The foregoing and other features and advantages of the invention will bebetter understood and appreciated from reading the following detaileddescription of one practical embodiment thereof in connection with theaccompanying drawing, in which Fig. 1 is a perspective View of apractical form of the invention; and

Fig. 2 is a view, partly in elevation and partly in Vertical section,showing the internal structure of the Work rest and its mounting.

In the drawing, l indicates a rotating shaft upon which is mounted aroughing tool I2 of any desired type, but preferably one of those shownand described in my copending application Serial No. 594,529, filed Feb.23, 1932, and which has become Letters Patent of the United States No.1,989,078, granted January 29, 1935.

I4 indicates a stationary portion of the frame of the machine which isprovided with anarcuate T-slot i6, concentric with the axis of the shaftI9 of the rotating roughing tool l2. In the arcuate guide slot it ismounted a support I8 which may be adjusted in said slot in a pathconcentric with the axis of the roughing tool and secured in any desiredposition therein by a Wing nut 20.

The support I8 is bored to receive a horizontally adjustable arm 22which is prevented from rotating by a spline 24 and has a threaded endportion, as shown at 26, to receive an adjusting nut 28. An expansionspring 30 holds the nut 28 against the support I8, to maintain theadjustment.

The forward end of the arm 22 carries a hub 32 having a vertical borethrough which passes a vertically adjustable carrier 34 for a bowlshapedwork rest or guard 36. The bowl carrier 3d is prevented from rotation inthe hub 32 by a spline38 and has its lower end portion threaded as shownat lll to receive an adjusting nut 42 which. is held against the underside of the hub 32 by an expansion spring fifi.

The upper end of the bowl carrier 34 carries a ball-bearing i6 uponwhich the bowl 36 is adapted to rotate freely about an upright axis. Thebowl-shaped work rest or shield 36 has a thin edge or rim, which may becorrugated as shown at 48 to prevent slipping of the work thereon,adapted to engage the bottom of the insole 59 of a lasted shoe 52 whichmay be pressed against said rim to facilitate accurate presentation ofthe overlasted margin 54 .of the shoe upper to the action of theroughing tool I2.

By adjustment of the work rest support I8 along the arcuate slot i6 thefront portion of the rim of the bowl Sii may be moved up or down aboutthe periphery of the roughing tool without otherwise altering therelation between the tool and the work rest. Thus the apparatus may beadjusted to facilitate presentation of the shoe to the roughing tool atthe angle best suited to the operator, having regard to ease of handlingthe shoe and watching the operation of the roughing tool thereon.

Having described the invention, what is claimed Vas new and desired tobe secured by Letters Patent of the United States is:

1. In ashoe roughing machine, the combination of a bowl-shaped rotarywork rest and a rotary roughing tool positioned partly Within saidrotary work rest, the axes of rotation of the work rest and the roughingtool being substantially at right angles to each other.

2. In a shoe roughing machine, the combination of a bowl-shaped, free,rotary guard, and a rotary roughing tool positioned partly Within saidrotary guard, the exposed portion of the periphery of the tool beingrotatable toward the rim of the bowl.

3. In a shoe :coughing machine, the combination of a bowl-shaped freelyrotatable work rest, and a rotary roughing tool having its peripheryacting across the rim of the bowl toward the axis thereof.

4. In an upper roughing machine, a bowlshaped shield having a thin upperedge adapted to be brought into contact with the bottom of the insole ofa lasted shoe to serve as a rest about which the shoe may be tilted, anda roughing tool rotating within said shield for roughing the overlastedmargin of the shoe upper.

5. In an upper roughing machine, a hollow bowl-shaped guard mounted forrotation about an upright axis with the forward portion of its upperedge exposed for the application of work thereto so that the upper edgeof the guard may be caused to roll along the bottom .of the insole of alasted shoe presented to the machine, and means for roughing theoverlasted margin of the shoe upper above the edge of the guard.

6. In a shoe roughing machine, a rotating roughing tool, a bowl-shapedwork rest in which a portion of said rotating tool is received, the bowlhaving a thin upper rim engageable by the insole of a lasted shoe whilesaid tool operates on the overlasted margin of the shoe upper, and awork rest mounting upon which said rest can be adjustably moved aroundthe tool in a path concentric with the axis of the latter.

7. In a shoe roughing machine, a bowl-shaped work rest freely rotatableabout an upright axis. a rotating roughing tool partly received in thebowl, a vertically adjustable bowl carrier, a horizontally adjustablearm sustaining the carrier and a support for the arm, which support isadjustable in an arc concentric with the axis of rotation of the tool.

CHARLES G. BROSTROM.

